Experienced speakers, what's your prep time factor for a talk you consider useful, solid, and well delivered?

Assume "talk time" is just the time spent on stage, and "prep time" encompasses all of drafting, writing, preparing slides, editing, and rehearsal. (Including any work you spend on the talk proposal, of course.)

"For every minute of talk time, I spend ___ minutes of prep time."

Boosts appreciated.

From Wolfram Alpha....

What Is ChatGPT Doing … and Why Does It Work?

https://writings.stephenwolfram.com/2023/02/what-is-chatgpt-doing-and-why-does-it-work/
>Stephen Wolfram explores the broader picture of what's going on inside ChatGPT and why it produces meaningful text. Discusses models, training neural nets, embeddings, tokens, transformers, language syntax.

Not gonna lie, this report is impressive, and every Mastodon instance should publish something like this every month. I have an account on mstdn.ca, and this is the kind of thing that would encourage me to move my main account from mastodon.social to mstdn.ca (although I would still support Eugen’s Patreon for his work on Mastodon, which benefits all instances). Staying put for now, though.

https://news.mstdn.ca/state-of-the-instance-nov-2022/

Scientists have finally achieved it. After years of painstaking research and lab experiments, mankind has finally created the purest, most concentrated, dumbest possible take.

> Congress should end the war in Ukraine by withdrawing from NATO

https://thehill.com/opinion/national-security/3750203-congress-should-end-the-war-in-ukraine-by-withdrawing-from-nato/